>>In a perfect world, I would treat all nucs made with queen cells at Day 21,
the short window in which the old brood has all emerged, and few new cells
have been capped.  An oxalic dribble on that day works great...

Despite the steady cold winter we just had, most of my hives did not go broodless.  When I finally treated them with OA in the 1st half of January, they had a small patch of brood.  And yet they are not suffering from varroa at this time and I don't see varroa (I don't do rolls or sugar shakes) or bees with deformed wings.  This supports the idea that varroa doesn't seem to overwhelm small patches of brood.  The varroa time table or desirable set of conditions seems out of phase with the bees'.

Waldemar


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